Patents by Inventor Douglas Peirce

Douglas Peirce has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Devices and methods for power control in horizontal directional drilling
    Patent number: 7954558
    Abstract: The present disclosure is directed to methods and apparatuses for controlling pump power draw from an engine in horizontal directional drilling.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: June 7, 2011
    Assignee: Vermeer Manufacturing Company
    Inventors: Philip R. Lane, Douglas Peirce
  • Method and Apparatus for Managing Rod Changes in Horizontal Directional Drill
    Publication number: 20090095526
    Abstract: This disclosure concerns methods and apparatuses for managing drill rods in horizontal direction drilling, among other things.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 16, 2009
    Inventors: Philip R. Lane, Scott A. Johnson, Douglas Peirce
  • Devices and Methods for Power Control in Horizontal Directional Drilling
    Publication number: 20090095527
    Abstract: The present disclosure is directed to methods and apparatuses for controlling pump power draw from an engine in horizontal directional drilling.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 16, 2009
    Inventors: Philip R. Lane, Douglas Peirce